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JAMB Mathematics 1992 Question 12

Question 12

Quadratic Equations

Solve the equation y − 11√y + 24 = 0

  1. A.8, 3
  2. B.64, 9
  3. C.6, 4
  4. D.9, −8
Show the answer and explanation

Answer: B (64, 9)

Explanation

Let u = √y: u2 − 11u + 24 = 0 gives u = 3 or 8. So y = 9 or 64.